Wire rope.



T. GORE.

WIRE ROPE.

APPLIDATION FILED JUNE 24,1903.

@22g/:Pil Patented May i8, 1909.

'll'llllfllED @TATS THOMAS GORE, OF BROOKLYN, NEW YORK.

I WIRE ROPE.

Specification of Letters Patent.

Patented May 18, 1909.

Application led June 2e, 1908. Serial No.r%0,089.

.To all 107mm it may concern:

Bc it known that l, THOMAS GORE, a citi zen of the Uuitdd States,residing at Brooklyn, N ew York, have invented certain new and usefulimprovements in lire Ropes,

of which the following'is a clear, full, and exact description.

My invention relates to wire ropes. When the ordinary rope (such, forinstance, as shown in the patents to Hammond No. 608,673 and Moxham No.337,513) is used for hoisting` purposes, for instance for hoisting` afreely suspended weight, the rope tends to untwist, or unlay, as it iscalled, which would cause the weight to spin. This is/undesirable, andvarious constructions have been tried to accomplish a non-rotatingeffect.

lt is the object of my invention to provide a construction of rope bywhich a nonrotating effect may be obtained, or at least approximated,and which will have other advantages.

Various ropes have been designed to avoid this untwisting effect, such,for instance, as the rope of the Tangring patent No. 883,759, in whichthere are s own two'layers of wires each of said layers being com osedof a series of strands, the strands o one layer being laid or woundspirally in a direction opposite to the lay of the other strands. lnorder to produce a complete counterbalancing effect between the-twolayers of wires, the unlaying or rotating effect of the two layersshould exactly counterbalance each other, but as the cross sectionalarea of the outer layer is greater than that of the inner layer, theouter layer will have a greater tendency to unlay than will the innerayer, and this must be counteracted in some way. By my invention l haverovided a construction of wire rope in wliich this non-rotating ornon-spinning effect may be obtained or approximated.

ln the drawings which show two preferred forms of my invention; Figure lis a plan view 5 Fig. 2 a section on the line :l-Y; Fig. 3 is a planview; and Fig. 4 a section on the line A-B of a preferred modification.

Referring to Figs. l and 2., .l have rovided a core 2 of fibrousmaterial, sucn as hemp or the like, which is surrounded by a layer ofwires which may be in, the form of individual wires 3 laid around thesame with. the desired twist. An outer layer of wires is also provided,such outer wires being assembled into a series of strands Il, a, whichare laid around the inner layer in the opposits direction, that is, inFig. 1 the inner wires 3 are laid to the left and the outer strands arelaid to the right. i In Figs. 3 and 4 l have shown a modified lconstruction in which the core and inner layer 3 is the same as before,but the strands of the outer layer are made smaller than are shown inFig. 2 and are preferably separated somewhat from each other and fromthe inner layer 3. The intervening spaces may be. iilled up by fibrousmaterial, and have referably 'accomplished this by winding hbrousmaterial around cach strand, such as by serving or braiding the covering5 around the same. soaked with tar or other lubricant which, after therope has been used for some time, will present a rubberlike outersurface for the entire ro e, will prevent chafing between the two ayersand will accomplish other advantageous results.

Obviously the cross sectional area of the outer layer of strands isshown as somewhat greater than that of the inner layer, but this may becounteracted if desired by giving the inner layer 3 a shorter or quickertwist or lay than that of the strands of the outer layer.

ln the construction illustrated in Figs. 3 and fl, it will be obviousthat the cross sectional area or" any one strand 4 is less'than thecross sectional area of that strand and the fibrous covering, and as itis obviously desirable in sucln a rope that the outer strands shallcompletely cover the rope, the combined cross sectional areas, andtherefore the unlaying eiiect of the outer series, is less than 'wouldbe the case if the cross sectional areas were increased. A furtheradvantage of my rope shown in Figs. 3 and el is that the spinningtendency of the outer layer may be decreased or increased withoutvarying the size of the rope, by decreasing or increasing ing increaseor decrease of the thickness of the covering material. By varying thesefeatures and the twist of the inner series as desired, a rope may beobtained which is practically without unlaying effect or which mayapproximate that result to the extent desire l.

It will be observed that in Fig. 4 the wire strands are l'ess in numberthan would be sufficient to completel surround the inner layer 3 if thestrands alone (that is, without rl`he iibrous material is preferablythesize of the strands and with a correspondthe covering) were placed incontact with the inner layer and with their axes parallel to that of thecore.

Although l have shown in the drawings the interior core covered with asingle layer of individual wires, l do not desire to be limited in allcases to. this feature and I am aware that various modifications of myinvention may be made without departing from the spirit of my inventionas set forth in the claims. l therefore do not limit Inyself to theconstructions illustrated and described.

What l claim is:

1. A wire rope having an outer series of strands laid in one direction,each strand composed of a series ot' wires twisted tightly together, aCentral core of fibrous material for said wire rope, said core beingcovered with an inner series of individual wires laid around the same ina direction opposite to the lay of said outer series,

2. ln a wire rope, a core of iibrous material, a layer of wires laidaround said core in one direction., an outer layer of wires made u intoa series of strands which are laid in t e opposite direction, each ofsaid strands having a covering of ibrous material wound around the same,each of said coverings touching the adjacent coverings and thei'irstmentioned layer of wires, whereby, if the thickness of the'fibrous Acoverings are increased or decreased, the size of said strandsmay be decreased or increased without varying` the size of the rope.

3. A wire rope having an outer series of strands laid in one direction,each strand composed of a series-of wires twisted tightly together, eachof said strands being separately covered with a ibrous material, acentral core of fibrous material for said wire rope, said core beingcovered with an inner series of individual wires laid around the sainein a direction opposite to the lay of said outer series.

4. A wire rope having an outer series of strands laid in one direction,each strand composed of a series of wires twisted tightly together, eachof said strands being separately covered With a fibrous material, acentral core of fibrous material for said wire rope, said core beingcovered with a single layer of individual wires laid around the sarne ina direction opposite to the lay of said outer series.

5. In a wire rope, a core of brous material, a layer of Wires laidaround said core in one direction, an outer layerof wires made up into aseries of strands which are laid in the opposite direction, each of saidstrands being separated from each other and from said irst-inentionedlayer by fibrous material, said strands being less in number than wouldbe suihcient to surround said first- Inentioned layer if said strandsalone were placed in contact with said inner layer with their axesparallel to that of the core.

6. ln a wire rope,a core of fibrous material, a layer of wires laidaround said core in one direction, an outer layer of wires made upv intoa series of strands which are laid in the opposite direction, eachof'said strands being separated from each other and from 'saidfirst-mentioned layer by fibrous material wound around each strand, saidstrands being less in number than would be suhicient to surround saidfirst-mentioned layer if said strands alone were laced in contact withsaid inner layer wit their raxes parallel to that of the core.

7. ln a wire rope, a kcore of iibrous material, a layer of Wires laidaround said core in one direction, an outer layer of Wires made up intoa series of strands which are laid in the opposite direction, each ofsaid strands being separated fromy the others when so laid, and fibrousmaterial wound around said strands and fillin the resulting spaces,whereby, if the thic ness of the fibrous coverings are increasedordecreased, the size of said strands may be decreased or increasedwithoutv varying the size of the rbpe.

Signed at New York city, this 17 th day of June, 1908.

THOMAS GORE.

Witnesses BEATRICE Minvis, C. T. NEAL.

